Geometry

1
Geometry

• Review

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TYPES OF LINES
1. Parallel Lines
- Two lines that never intersect.
2. Perpendicular lines
- Two lines that intersect forming right angles.
3
Types of Angles
Right angle
- an angle with 90 degrees
- an angle between 0 90 degrees
Acute angle
Obtuse angle
- an angle between 90 180 degrees
Straight angle
- an angle with 180 degrees in it.
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Types of Polygons

• Triangles
• Quadrilateral
• Pentagon
• Hexagon
• Heptagon
• Octagon
• Nonagon
• Decagon
• Undecagon
• Dodecagon
• N- gon

• Has three sides
• Has four sides
• Has five sides
• Has six sides
• Has seven sides
• Has eight sides
• Has nine sides
• Has ten sides
• Has eleven sides
• Has twelve sides
• Has N- sides

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Polygons

• Polygons are simple, closed, planar geometric
  figure whose sides are line segments.
• The number of sides is the same as the number of
  angles.
• Concave polygon have an indentation.
• Convex polygons have no indentation.

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Types of Quadrilaterals

• Has one set of parallel sides.
• Has two sets of parallel sides
• A parallelogram with all equal sides
• A parallelogram with all right angles
• A Rectangle with all equal sides.

• Trapezoid
• Parallelogram
• Rhombus
• Rectangle
• Square

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Regular Polygons

• A regular polygon has all equal sides and all
  equal angles.
• A square is an example of a regular
  quadrilateral.
• Here are some other examples.

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TRIANGLES

• In regards to ANGLES
• Right
• -Has 1 right angle
• Obtuse
• -Has 1 obtuse angle
• Acute
• -Has all acute angles
• Equiangular has all angles the same measure.

• In regards to SIDES
• Equilateral
• - all equal sides
• Isosceles
• - 2 equal sides
• Scalene
• No equal sides

There are 180 degrees in a triangle !!!!